Ticket Pop-up Message

Ticket Pop-up Message

Hi,

For some of my software or hardware tickets i would like to have a pop-up message to the users that the software or hardware will require approval and require a business case. 
I saw something to this effect in a video, but it didn't go into any description of what needs to be done to get it to work. 
Is there an action script i can enter in the "on form load" event that will pop up a note for the user?

Thanks. 

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